Ch ChemAI

All experiments › The periodic table

Alkali metals and water

Lithium, sodium and potassium: how does reactivity change down Group 1?

🧪 Start the experiment — free

Runs in the browser on phones, tablets and computers. No sign-up needed. For teachers: assign any experiment to a class, see results and calculations.

What you do

1. Add lithium to beaker 1.
2. Add sodium to beaker 2.
3. Add potassium to beaker 3.
4. Test the gas from beaker 1 with a burning splint. Why is each solution pink?

Safety in a real lab

⚠ Only tiny pieces, behind a safety screen, with goggles. Never touch alkali metals.

More experiments on this topic